Abstract: Propose the ellipse zone routing protocol which touched off in position and made full use of geographical position information in order to reduce the controlling message expenses and route expenses effectively, and on the other hand, it can improve the global performance of the network. Through mathematics analysing and comparing between the routing protocol touched off in the position and that touched off regularly , we get the idea that the former can reduce the controlling expenses greatly. The paper utilizes the oval regional route characteristic mathematics model to analyze, and provides the corresponding expense function. There are very good advantages on performance effectively of the oval directional inundation mechanism of area, such as preventing the inundation cavity avoiding and the protocol can be realized simply and conveniently. The simulation in the paper has verified the result.

Key words: Ad-Hoc, LEZR, location-Triggered, Overhead-analysis, Cavity-bypass